Cai Qiushen, Guan Huashen, Zhang Junjie, Zhang Xiaoguang, Duan Chenfeng
Jiangmen Power Supply Bureau of Guangdong Power Grid Co. Ltd., Jiangmen, Guangdong, China.
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou, China.
PLoS One. 2025 Jun 2;20(6):e0317410. doi: 10.1371/journal.pone.0317410. eCollection 2025.
In order to further enhance the wear resistance of the camshaft surface, this study conducted shot peening reinforcement on CF53 steel. The research involves the analysis of microstructure, microhardness, and residual stress evolution. Additionally, a pin-on-disk friction and wear test machine was used to investigate the influence of shot peening on the friction-wear characteristics of CF53 steel. The results show that a certain depth of plastic deformation layer is formed on the surface after shot peening, accompanied by an increase in surface roughness. With the increase of shot peening pressure, the surface roughness, microhardness, and residual stress values of the samples correspondingly increase. Shot peening treatment significantly improves the friction-wear performance of CF53 steel, with a reduction of 22.5% and 54.6% in the friction coefficient and wear rate for SP3 and SP4 groups, respectively, compared to untreated samples. The wear mechanism of untreated samples is characterized by severe fatigue wear with prominent features of plowing grooves and cracks. In contrast, the wear mechanism of peened samples shifts to fatigue wear dominated by delamination.
为了进一步提高凸轮轴表面的耐磨性，本研究对CF53钢进行了喷丸强化处理。该研究涉及微观结构、显微硬度和残余应力演变的分析。此外，还使用销盘式摩擦磨损试验机研究喷丸处理对CF53钢摩擦磨损特性的影响。结果表明，喷丸处理后在表面形成了一定深度的塑性变形层，同时表面粗糙度增加。随着喷丸压力的增加，样品的表面粗糙度、显微硬度和残余应力值相应增加。喷丸处理显著提高了CF53钢的摩擦磨损性能，与未处理样品相比，SP3组和SP4组的摩擦系数和磨损率分别降低了22.5%和54.6%。未处理样品的磨损机制以严重的疲劳磨损为特征，有明显的犁沟和裂纹。相比之下，喷丸处理样品的磨损机制转变为以分层为主的疲劳磨损。
